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Troubleshooting
If a problem should arise, first check the following:
Are the connections correct?
Is the set being operated as described in the owner’s manual?
Are the other devices operating properly?
If steps 1 to 3 above do not improve the problem, restarting the device may improve the problem.
Continue pressing the 
button on the unit until “Restart” appears in the display, or remove and re-insert the power cord of the unit.
If this unit does not operate properly, check the corresponding symptoms in this section.
If the symptoms do not match any of those described here, consult your dealer as it could be due to a fault in this unit. In this case, disconnect the power immediately and contact the store where you purchased this unit.